.title{
    position: absolute;
    left: -100%;
    overflow: hidden;
}
html{
    width: 100%;
    height: 100%;
}
body{
    height: 100vh;
}
.box{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: inherit;
}
/* -------------------------------------------------------------------- */
/* ----------------------------header---------------------------------- */
/* -------------------------------------------------------------------- */
header{
    width: 100%;
    height: 60px;
    background-color: #000;
    position: fixed;top: 0;
    z-index: 2;
    opacity: 0.7;
}
.header{
    width: 1050px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    position: relative;
}
.header>a>img{
    height: 60px;
    width: 200px;
}
.nav{
    flex-grow: 1;
}
.nav>li{
    display: inline-block;
    margin: 0 20px;
}
.nav>li>a{
    font-size: 14px;
    color: white;
    text-decoration: none;
}
.nav>li>a:hover{
    color: red;
}
.logon>a>span,.logon>div{
    display: inline-block;
    font-size: 28px;
    color: white;
    display: inline-block;
    margin-right: 10px;
    height: 60px;
    line-height: 60px;
}
.logon>a>span:hover{
    color: red;
}
.hide{
    display: none;
    position: absolute;
    top: 60px;left: 0;
    background-color: rgba(245, 245, 245,0.4);
    z-index: 1;
}
.hide>div{
    width: 1200px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.hide>div>input{
    width: 480px;
    height: 40px;
    box-sizing: border-box;
    padding: 10px;
    font-size: 14px;
    border-radius: 5px;
}
.hide>div>button{
    height: 40px;
    width: 100px;
    background-color: #3688FF;
    text-align: center;
    line-height: 40px;
    border: none;
    border-radius: 5px;
}
.hide>div>button>span{
    font-size: 20px;
    color: white;
}
.logon>.icon:hover .hide{
    display: block;
}
.logon>a>button{
    width: 100px;
    height: 40px;
    font-size: 14px;
    background-color: rgb(245, 245, 245);
    vertical-align: middle;
    position: relative;
    top: -7px;
}
.logon>a>button:hover{
    background-color: red;
    color: white;
}
/* -------------------------------------------------------------------- */
/* ------------------------------main---------------------------------- */
/* -------------------------------------------------------------------- */
main{
    margin-top: 60px;
    width: 100%;
    flex-grow: 1;
}
/* -------------------------------------------------------------------- */
/* ------------------------------footer-------------------------------- */
/* -------------------------------------------------------------------- */
footer{
   background-color: #505050;
    width: 100%;
}
.footer *{
    text-decoration: none;
}
.footer{
    width: 1050px;
    margin: 0 auto;
}
.footer_top{
    display: flex;
    justify-content: center;
}
.footer_top>ul{
    width: 25%;
    height: 200px;
    text-align: center;
    margin: 20px 0;
}
.footer_top>ul>li{
    margin-top: 10px;
}
.footer_top>ul>li>a{
    color: white;
    font-size: 14px;
}
.footer_top>ul>li>a:hover{
    color: red;
}
.footer_bottom{
    text-align: center;
}
.footer_bottom>a{
    color:white;
    text-decoration: none;
    font-size: 16px;
    margin: 0 20px;
}
.footer_bottom>p{
    font-size: 14px;
    margin-top: 20px 0 0 0;
    color: white;
}